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प्रश्न
Fill in the blank
A ________ substance has only one kind of matter.
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उत्तर
A pure substance has only one kind of matter.
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संबंधित प्रश्न
Fill in the blank
Mixtures can be ...................... or .....................
Fill in the blan
Iodine, camphor, naphthalene, ammonium chloride and dry ice are some substances that ....................................
Write true or false
Handpicking can be used as a separation technique if the particle size of the constituents of the mixture is the same.
Suggest a suitable technique to separate the constituents of the following mixtures. Also give the reason for selecting the particular method.
Water and alcohol
State any one method – to separate the following mixtures – A liquid-liquid mixture containing – two immiscible'' liquids having different densities
Explain with diagram the process used to – separate the following substance from the given mixtures - Benzene from a mixture of – benezene [b.p. 80°C] & toluene [b.p. 110°C].
Give a reason for the following statement :
Components in a mixture can be separated by physical methods only.
How can husk or fine dust particles be separated from rice before cooking?
Match the mixtures in column I with their method of separation in column II.
| COLUMN I | COLUMN II | ||
| (a) | Oil mixed in water | (i) | Sieving |
| (b) | Iron powder mixed with flour | (ii) | Hand picking |
| (c) | Salt mixed with water | (iii) | Decantation |
| (d) | Lady’s finger mixed with french beans | (iv) | Magnet |
| (e) | Rice flour mixed with kidney beans | (v) | Evaporation |
Name the two phases in the separation of the mixtures in chromatography.
